Magnets
Describe a force that are brought on by magnets.
Push or a pull
Name something that has a lot of friction
sandpaper, rough things, sticky things
A force is a push/pull on an object.
What makes bridges successful?
support
Magnets are stronger when they are close/far away.
Sandpaper is slower when sliding because....
it has a lot of friction.
Give an example of a pull
examples
opposite reactions - pushing down on the bridge with car, pushing up with pillars or arches or pulling up with suspensions
What is something that is magnetic in this classroom?
white board, desk
Why will teachers beat students in a tug of war? (thinking about friction)
Teachers have more friction because they weigh more.
Why did the last rubber band pop the water melon?
It created a force that was bigger than the water melon.
Why was the suspension bridge a good design for the Golden Gate bridge?
Ships have to pass underneath.
What type of material do magnets attract?
Iron
What can you do to slide down a slide faster?
add water, wear slick pants, add soap
Give an example of a push
examples
Why are pillar bridges and arch bridges stronger than a board bridge?
The pillars and arches are pushing up to support the bridge.
Are paper clips magnets? Why or why not?
No, because they do not pull things towards it. They can be magnetized by other magnets.
Does more friction makes things slow or fast?
Slow
Why do hoppers hop off the table?
Because the rubber band was pulling up on the sides of the hopper. (after we push the hopper down)
Name 2 different types of bridges
pillar, suspension, arch